Separation preventing device of fluid pipe, and pipe joint

Patent metadata

Field	Value
Publication number	US-9810356-B2
Application number	US-201514642276-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Mar 10, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A separation preventing device that prevents separation of a fluid pipe in a pipe axis direction, includes a main body externally fitted to an outer peripheral surface of the fluid pipe and has a recess portion facing the outer peripheral surface; a locking member housed in the recess portion in a tiltable manner and is able to bite into the outer peripheral surface of the fluid pipe; a pressing member provided in the main body member and presses the locking member so as to bite into the outer peripheral surface of the fluid pipe; and an interposition member interposed between the locking member and the pressing member, wherein the interposition member is equipped with a tapered surface coming into contact with an outer surface of the locking member, and is housed in the recess portion in a state of having an acceptable movement value of a predetermined width in the pipe axis direction of the fluid pipe.

First claim

What is claimed is:

1. A separation preventing device that prevents separation of a fluid pipe in a pipe axis direction, the separation preventing device comprising:
a main body member that is externally fitted to an outer peripheral surface of the fluid pipe and has a recess portion facing the outer peripheral surface;
a locking member that is housed in the recess portion in a tiltable manner and is able to bite into the outer peripheral surface of the fluid pipe;
a pressing member that is provided in the main body member and presses the locking member so as to bite into the outer peripheral surface of the fluid pipe; and
an interposition member interposed between the locking member and the pressing member,
wherein the pressing member is configured to press a center portion in the circumferential direction of the locking member; the interposition member is equipped with a tapered surface coming into contact with an outer surface of the locking member, and is housed in the recess portion in a state of having an acceptable movement and tilting value in the pipe axis direction of the fluid pipe; and a gap portion which permits movement and tilting of the locking member is formed between an end surface on a rear side of the center portion of the locking member and a side wall surface of the recess portion.

2. The separation preventing device of a fluid pipe according to claim 1 , wherein the outer surface of the locking member is formed on the inclined surface that comes into contact with the tapered surface of the interposition member substantially in parallel.

3. The separation preventing device of a fluid pipe according to claim 1 , wherein the interposition member is equipped with a pressing target surface that comes into contact with the pressing surface of the pressing member in a tiltable manner.

4. The separation preventing device of a fluid pipe according to claim 1 , wherein the pressing member is provided in the main body member so as to be movable back and forth in a radial direction of the fluid pipe.

5. The separation preventing device of a fluid pipe according to claim 1 , wherein a rear edge of the pressing surface of the pressing member, a rear end surface of the interposition member, and a rear end surface of the locking member are sequentially disposed from the rear side in the pipe axis direction of the fluid pipe.

6. The separation preventing device of a fluid pipe according to claim 1 , wherein the locking member has a plurality of wedge portions in a front-back direction of a pipe axis of the fluid pipe, and is equipped with a projection portion that regulates biting of a front wedge portion of the plurality of wedge portions into the fluid pipe, when the fluid pipe moves to a separation side in the pipe axis direction.

7. The separation preventing device of a fluid pipe according to claim 6 , wherein the projection portion is provided between the front wedge portion and the rear wedge portion of the plurality of wedge portions.

8. The separation preventing device of a fluid pipe according to claim 6 , wherein the projection portion is a wedge portion that bites into the fluid pipe at least by tilting.

9. The separation preventing device of a fluid pipe according to claim 6 , wherein a leading end of the projection portion does not project from a line that connects a leading end of the front wedge portion and a leading end of the rear wedge portion.

10. The separation preventing device of a fluid pipe according to claim 6 , wherein the wedge portions tilt to a front side in the pipe axis direction of the fluid pipe.

11. The separation preventing device of a fluid pipe according to claim 1 , wherein the locking member has a central portion, a peripheral side portion extending to a lateral side of the central portion, and is equipped with a contact portion with which the peripheral side portion and the recess portion come into contact in a state in which the central portion of the locking member and the recess portion are spaced apart from each other.

12. The separation preventing device of a fluid pipe according to claim 11 , wherein the peripheral side portion of the locking member is equipped with a peripheral side portion inclined surface that tilts toward an inner side in a radial direction of the fluid pipe and toward a front side in the pipe axis direction of the fluid pipe from the contact portion.

13. The separation preventing device of a fluid pipe according to claim 11 , wherein a dimension in the pipe axis direction of the central portion of the locking member is formed to be greater than a dimension in the pipe axis direction of the peripheral side portion of the locking member.

14. The separation preventing device of a fluid pipe according to claim 11 , wherein the recess portion is equipped with a pressing wall coming into contact with the peripheral side portion of the locking member, and a rear side wall facing the central portion of the locking member.

15. The separation preventing device of a fluid pipe according to claim 1 , wherein at an end portion of the locking member in a circumferential direction of the fluid pipe, a fitting groove configured to fit an anti-falling elastic body of the locking member from the recess portion is formed tapering toward an outer diameter direction of the fluid pipe.

16. The separation preventing device of a fluid pipe according to claim 15 , wherein the fitting grooves are formed between a plurality of wedge portions provided on the locking member.

17. The separation preventing device of a fluid pipe according to claim 15 , wherein the fitting grooves of the locking member are formed to penetrate in a radial direction of the fluid pipe.

18. A pipe joint comprising:
the fluid pipe;
a pipe socket into which a front end portion of the fluid pipe is inserted; and

the separation preventing device of the fluid pipe that prevents separation of the fluid pipe from the pipe socket according to claim 1 .

19. The separation preventing device of a fluid pipe according to claim 2 , wherein the interposition member is equipped with a pressing target surface that comes into contact with the pressing surface of the pressing member in a tiltable manner.

20. The separation preventing device of a fluid pipe according to claim 2 , wherein the pressing member is provided in the main body member so as to be movable back and forth in a radial direction of the fluid pipe.

21. The separation preventing device of a fluid pipe according to claim 2 , wherein a rear edge of the pressing surface of the pressing member, a rear end surface of the interposition member, and a rear end surface of the locking member are sequentially disposed from the rear side in the pipe axis direction of the fluid pipe.

22. The separation preventing device of a fluid pipe according to claim 7 , wherein the projection portion is a wedge portion that bites into the fluid pipe at least by tilting.

23. The separation preventing device of a fluid pipe according to claim 7 , wherein a leading end of the projection portion does not project from a line that connects a leading end of the front wedge portion and a leading end of the rear wedge portion.

24. The separation preventing device of a fluid pipe according to claim 7 , wherein the wedge portions tilt to a front side in the pipe axis direction of the fluid pipe.

25. The separation preventing device of a fluid pipe according to claim 12 , wherein a

Assignees

• Cosmo Koki Co Ltd
• Kubota Kk

Inventors

• Maeda Yoshinori
• Sato Atsushi
• Ogata Toshihiko

Classifications

• F16L23/024 Primary

  characterised by how the flanges are joined to, or form an extension of, the pipes · CPC title

• F16L23/003

  Auxiliary devices · CPC title

• F16L23/02 Primary

  the flanges being connected by members tensioned axially (F16L23/12 takes precedence) · CPC title

• F16L21/08 Primary

  with additional locking means (F16L21/06 takes precedence; couplings of the quick-acting type F16L37/00) · CPC title